SANTA FE, N.M. (AP) — Educators are cautioning Gov. Susana Martinez's administration against rushing the implementation of a new law that will assign grades A to F to rate the performance of public schools.

Teachers, superintendents and others raised questions Monday about proposed rules by the Public Education Department for the school rating system enacted earlier this year.

Gloria Rendon of the Coalition of School Administrators suggested the new grading system initially be implemented in a few schools to serve as a pilot for working out potential problems.

But Larry Langley of the New Mexico Business Roundtable urged the department to start using the grading system quickly because it will help businesses assess the quality of schools as part of their decision-making in whether to move their operations to New Mexico.